InTrans / Aug 14, 2018

Timber bridges in Southern Iowa

The state of Iowa is composed of 99 counties. These counties have limited funds for bridge rehabilitation on many rural and agricultural roadways. In recent years, several counties have looked to timber construction as a bridge replacement alternative. In southern Iowa, two counties are constructing stress-laminated timber bridges using eastern cottonwood, a locally abundant, underutilized species. The performance of three such bridges is presented.